We should be careful not to assume we’ve learned everything from a small amount of information.
That said, the October 2016 issue of Psychology Today magazine has two thought-provoking articles on narcissism which are worth looking at. One appears in abridged form on the magazine’s website, and the other, as far as I can tell, is in its entirety.
Please consider reading the print edition. In the meantime, here’s a link to the issue’s cover story, written by Rebecca Webber: